Increased left ventricular myocardial extracellular volume is associated with longer cardiopulmonary bypass times, biventricular enlargement and reduced exercise tolerance in children after repair of Tetralogy of Fallot

Table 3 ECV and native T1 results

		Patients	n	Controls	n	p
Native T1 (ms)
Entire left ventricle	mid	974 ± 37	29	986 ± 29	15	0.26
	base	982 ± 37	31	998 ± 25	15	0.10
Interventricular septum	mid	990 ± 49	31	1000 ± 39	15	0.44
	base	989 ± 43	31	999 ± 28	15	0.34
Left ventricular free wall	mid	970 ± 50	31	989 ± 46	15	0.20
	base	963 ± 52	30	983 ± 30	15	0.11
Extracellular volume (%)
Entire left ventricle	mid	23.6 ± 3.3	28	23.4 ± 3.0	14	0.84
	base	24.0 ± 3.2	28	22.9 ± 2.6	13	0.25
Interventricular septum	mid	24.3 ± 3.7	30	22.8 ± 2.7	14	0.13
	base	23.7 ± 3.3	29	23.1 ± 2.8	13	0.57
Left ventricular free wall	mid	22.3 ± 3.8	30	23.1 ± 2.7	14	0.43
	base	22.3 ± 3.9	27	21.5 ± 2.4	13	0.45

Data are given as mean ± standard deviation. The varying numbers n of available values for the different measurements is attributed to image quality, i.e., image quality of some native or post contrast T1 maps was reduced in parts

ISSN: 1532-429X